@mixin key-frame($name: move) {
  @keyframes #{$name} {

    from {
      height: 0;
    }
    to {
      height: 1000px;
    }
  }

  @-webkit-keyframes #{$name} {

    from {
      height: 0;
    }
    to {
      height: 1000px;
    }
  }
}

@mixin animation($name, $time) {
  -webkit-animation: $name $time;
  -o-animation: $name $time;
  animation: $name $time;
}

@mixin demo {
  color: #00b3ee;
}

@include key-frame(move);

.aside {
  @include animation(move, 5s);
}
